iPhone 3GS users can now safely update to 3.1 firmware without updating the baseband (for unlock). If you are not the one to download all the various files and just want the ultimate result, these files are waiting for you to download! If you rather want to start from scratch, download Pwnage 3.1.3 tool for Mac.

I did not jailbreak my iphone 3gs 3.0.1 (baseband 04.26.*) before using the custom firmware given here (was following steps given on another site). Now I get a 1600 error in DFU mode and 1604 error in recovery mode.
Am I out of luck at this point?
I cannot go back to 3.0.1 because apple has stopped signing that version and cannot update to apple 3.1.2 because I won't be able to unlock after that.
Is there anything at all I can do now?

Yep, all you have to do is try blackra1n and then 3.1.2 custom firmware (put iPhone in restore mode)…

# 17 October 2009 at 7:37 pm

m_useless said:

But doesn’t blackra1n update to 3.1.2 without retaining the old baseband? I need to eventually unlock my phone so, cannot update the baseband. Also, at this point in time, my phone only comes up in recovery or DFU modes. Can blackra1n be used in this state?
Thanks for your help.
-M

# 18 October 2009 at 7:50 am

bankim said:

When you say "Download the following files ONLY"
if you have an Official iPhone contract with your cell carrier (ATT and others….) Or

if you don’t have an iPhone contract (T-Mobile and others…)

What way shuould I go ? I had AT&T contract, but it is no more. So my iphone can work only with AT&T services (currently not under usage)
If I want to use it with Tmobile , HOw should I go from above 2 options ??

If you are planning on using T-Mobile with your iPhone – Download the Activated firmware (T-Mobile and others)…

# 21 October 2009 at 6:18 pm

Amir said:

YOU SAVED MY ASS !!

# 27 October 2009 at 10:35 pm

purushoth said:

hi i have iphone 3gs with 3.(O2)1, i try to unlock it, but it give 1600 error ,after that i follow that through recovery mode it give 1604error, my display only show emergency call!!! please help me to unlock my iphone to use….!

What firmware is on your iPhone right now? You must jailbreak your iPhone before proceeding with 3.1.2 custom firmware… Try blackra1n first at 3.0.x..

# 31 October 2009 at 4:07 pm

purushoth said:

thank you, iPhone3.1, i'm new for this could you please direct me to get work my iphone please,

# 31 October 2009 at 6:03 pm

purushoth said:

achualy i'm for sri lanka, i got the iphone from u.k with O2, now i have to unlock and use it please help me, in my iphone display its showing emergency call!! i try to restore the os it give error 1600(dfu mode) and 1604(recovery mode). i tried with Not Activated Custom Firmware. please direct me to don it.!!

Please follow the error 1600 steps post on this site. Downgrade to 3.0.1 and jailbreak it using resn0w for Windows and then custom firmware it to 3.1.2…

# 31 October 2009 at 8:03 pm

Nick said:

hi, im in australia and have 3gs 3.0 whitch was bought from optus and i am using optus sim. im running win xp and itunes 9.0.2.25.
i used blackra1n to jailbreak 3.0, but it didnt work, and now im stuck in recovery mode.
i tried to restore using 3.0, 3.0.1, 3.1.2 ipsw files in both dfu and recovory modes, and itunes says that, "this iphone could not be restored, this device isnt eligable for the requested build". I havent tried 3.1 ipsw though. What should i do to fix this problem? could someone plz give me a hand with a step by step process. plz thankyou.

Unfortunately, the process for 3GS is way complicated when it is stuck in Recovery mode and the solution is not guaranteed. Did you ever run Cydia on your 3GS iPhone? Did you ever jailbreak your 3GS? If yes, then we can try few more steps.

blackra1n is not the most elegant jailbreak solution for 3.0 firmware unfortunately. Why don't you try running blackra1n again – give it some time to do its thing and hopefully it will work.

Apple won't let you get to 3.1 or 3.1.2 since 3.1.3 was just released and only 3.1.3 can be applied to your 3GS if all else fails.

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